*Product May Be Subject To Extended Lead Times. Keep your pond water crystal clear with this 15W UV sterilizer. Suitable for ponds up to 12,000 liters, this unit effectively controls algae blooms, bacteria, and other harmful microorganisms, improving overall water quality. Designed for efficiency and durability, it is easy to install and ensures a healthy aquatic habitat for fish and plants. Max flow per minute 60 lt / pm.